mt76: mt7615: add support for mtd eeprom parsing
Calibration data are often available on a specific mtd partition on embedded devices. Take into account eeprom calibration data if available. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Felix Fietkau <nbd@nbd.name>
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@ -42,13 +42,13 @@ static int mt7615_efuse_read(struct mt7615_dev *dev, u32 base,
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static int mt7615_efuse_init(struct mt7615_dev *dev)
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{
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u32 base = mt7615_reg_map(dev, MT_EFUSE_BASE);
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int len = MT7615_EEPROM_SIZE;
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int ret, i;
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u32 val, base = mt7615_reg_map(dev, MT_EFUSE_BASE);
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int i, len = MT7615_EEPROM_SIZE;
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void *buf;
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if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)
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return -EINVAL;
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val = mt76_rr(dev, base + MT_EFUSE_BASE_CTRL);
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if (val & MT_EFUSE_BASE_CTRL_EMPTY)
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return 0;
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dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);
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dev->mt76.otp.size = len;
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@ -57,6 +57,8 @@ static int mt7615_efuse_init(struct mt7615_dev *dev)
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buf = dev->mt76.otp.data;
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for (i = 0; i + 16 <= len; i += 16) {
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int ret;
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ret = mt7615_efuse_read(dev, base, i, buf + i);
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if (ret)
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return ret;
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@ -76,6 +78,18 @@ static int mt7615_eeprom_load(struct mt7615_dev *dev)
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return mt7615_efuse_init(dev);
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}
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static int mt7615_check_eeprom(struct mt76_dev *dev)
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{
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u16 val = get_unaligned_le16(dev->eeprom.data);
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switch (val) {
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case 0x7615:
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return 0;
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default:
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return -EINVAL;
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}
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}
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int mt7615_eeprom_init(struct mt7615_dev *dev)
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{
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int ret;
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@ -84,7 +98,10 @@ int mt7615_eeprom_init(struct mt7615_dev *dev)
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if (ret < 0)
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return ret;
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memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, MT7615_EEPROM_SIZE);
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ret = mt7615_check_eeprom(&dev->mt76);
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if (ret && dev->mt76.otp.data)
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memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,
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MT7615_EEPROM_SIZE);
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dev->mt76.cap.has_2ghz = true;
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dev->mt76.cap.has_5ghz = true;
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